<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
	<style>
		
		ul {
			padding: 0;
			margin: 0;
			list-style: none;
			width: 600px;
			height: 40px;
			text-align: center;
			line-height: 40px;

			display: flex;
		}

		li {
			flex: 1;
			background-color: pink;
		}
		
	</style>
</head>
<body>
	<ul>
		<li>QQ</li>
		<li>商品分类</li>
		<li>我的订单</li>
		<li>购物车</li>
	</ul>
</body>
</html>